Fine Particle Ammonium Polyphosphate Phase II for Water Based Intumescent Coatings

• CAS No.: 68333-79-9
• Formula: (Nh4po3)N
• EINECS: 269-789-9
• Certification: RoHS, ISO
• Purity: 90%~99%
• Type: Ammonium Polyphosphate
• Model NO.: APP-II
• Grade Standard: Industrial Grade
• Appearance: White Powder
• Transport Package: 25kg/Bag on Pallets
• Specification: HG/T2770-2008
• Trademark: Chenxu
• Origin: Shandong, China
• HS Code: 2835399000
• Production Capacity: 1500mt/Month

Product Description

Ammonium Polyphosphate Phase II For Water based intumescent coatings


1. Application

Ammonium Polyphosphate (APP), Cas No 68333-79-9, is an environment-friendly and halogen-free flame retardant. APP is the main constituent of many intumescent flame retardant systems: coatings, paints and engineering plastics.
Depending on the polymerization degree, there are two main families of ammonium polyphosphate: Crystal phase I APP (or APP I), and Crystal phase II APP (or APP II). 
- APP phase I has a short and linear chain (n < 100), it is more water sensitive (hydrolysis) and less thermally stable; actually it begins to decompose at temperatures above 150 °C. 
- The second family of Ammonium polyphosphate is the APP Phase II; which has an high polymerization degree, with n>1000, its structure is cross linked (branched), and it is an high-quality non-halogenated flame retardant. APP phase II, Ammonium polyphosphate, has an higher thermal stability (the decomposition starts at approximately 300°C) and lower water solubility than APP I.

APP phase II is probably one of the most effective non-halogen fire retardants in the market.
Main Applications: 
Solvent based and Water based intumescent coatings. 
Flame retardant for polyurethanes. 
Flame retardant for unsaturated polyesters. 
Flame retardant for epoxies. 
Flame retardant for acrylics.

2. Package, transportation and storage

Package: Internal plastic with knitted exterior covered with film, with the net weight of 25kg.
Loading Container: 25kg/bag on pallet, 18 metric ton per 20'container
Transportation: The product is not dangerous one, which should be protected from damp, rainfall and package damage in transportation.
Storage: At dry warehouse with good ventilation.

3. Product:   Ammonium Polyphosphate phase-II - Cas No 68333-79-9

Appearance     White powder
pH (10% slurry -25°C)     5.5-7.5
Solubility in water (25°C), g/100ml H2O     0.50 Max
Nitrogen, w/w%     14.0-15.0
Phosphorus (P), w/w%     31.0-32.0
Thermal decomposition onset, °C     285 Min
Particle Size D₅₀, µm     About 15